Vibratory mechanism for dust-collectors.



A'. G, WARREN. VIBRATORY MECHANISI FOR DUST COLLECTORS.

APPLICATIONy FILED Dic. 22. 1911.'

' l Patented. De@ 3, 1918.

. 2 SHEET HEET 1 MQ 1551 glrnglral Lip A.. G. WARREN.

VIBRATORY MECHANISM FOR DUST COLLECTORS. APPLICATION FILED DEC. 22. isn.'

1,286,458. Patented Deo.3,1918.

2 SHEETS-SHEET 2.

@nu v5 2-2. f76,

to the respective frames 10 in taut condition and maintained against sagging or improper stretching by transverse cords i4 or equivalent means connected to the frame and bridging the. space between the frame parts.

15 designates lugs preferably secured to the respective screens at. substantially the central portion ot' the bottom bars il and normally in the path of movement ol striker fingers 16 lixedly carried by a shaker bar 17. By reference to Fig. l, it will be seen that the bar 17 is journalcd for recipmmating movement on the. casing l and passes transversely of the air inlet chamber below the bottom of the screen structure. 'lhe fingers 16 are sullicicnt in mnnber to insure cach screen bein v tapped or struck by one of the fingers as t ie bar 17 is moved back and forth and a handle i8 is provided for manually operating the bar at will. Alt will be understood, howeverq that the. shaking of the bar is not limited to manual operation as obviously this may be accomplished by any equivalent means.

l!) designates straps.I preferably of inc tah for the respective screens, each strap passing around the. lugs 15 and being secured to the fraaie of the screen in any well known manner. These straps are located to receive. the impact of the fingers 16 and thus prevent damage to the wooden frame.. Obviously, this construction is but one manner of protecting the frame from the action of the reciprocable. member and the invention is therefore not restricted to this exact con-' struction.

lt should be noted that the im pact device is entirely independent of the screen structure and is so arranged as to strike the frames at a point removed from the place of support and where the maximum vibration may be. given to the screen frames. ln order to further increase thc effective vibration. each screen is provided with a number of wires 2() substantially radiating from thc section of the screen immediately :alim-.ent the place where. the fingers iti strike thc frame. These wires 20 are stretched relativelj.l tight and are connected to comparatively widely :aiparated partsl ol the. screen, 'so that practically all portions of theI screen arca are subject to the action of these wires. This action is a vibratory one since the im pact of the finger with the protected lug 15 -is transmitted to the wires 2t) and thence over the screen, whereby all collected dust is dislodged and the. l'abrirI maintained clean and operative.

In the ordinary apparatus embodying hammers or rigid mechanism for jarring the screens, it has been found that the screen frame, owing to its substantial construction absorbs the vibrations to a material extent and consequently while the blow or blows may be sufficient to liar some of the collected dust from the'screcn, there still remains an appreciable quantity clinging to the screen fabric. This residue. gradually,accumulates until the dust separating area becomes considerably restricted and in man)` instances necessitates the entire, machine. being shut down to clean the screens. ln the device of the. present invention, the freely suspended ends of the screens respond readily to the impact of the reciproca )le lingers and give a true vibratory action which is transmitted directly by 'ay of the wires 20 to the surface of the screens. Pockets and areas of segregated dust are thus entirel eliminated and the screens maintained in e cient opera tive condition at all' times.

The operation of the device is obvious by references to Fig. 1, in that all that is necessary is to grasp the handle 18 and reciprocate the bar 17 whereupon the fingers 16 strike adjacent lugs 15 of the respective screensand broduce the ref aired vibration. The wires 2f), as will be understood, are im portant adjuncts of the apparatus in that they direct the vibrations te all parts of the .screen surface and uniformly distribute the etects of the impact.

lt will now be apparent that l have devised a novel and useful construction which embodies thc features of advantage enumerated as desirable in the statement of the invention and the above description and while l have in the present instance shown and described the preferred embodiment thereof, which has been found in practice to give 100 l satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

What l claim is:

1. 1n a dust collecting apparatus, a casing, ing, a plurality of screens sus )ended therein, a bar mounted transversely below said screens and adapted to he reciprocated and means carried by said bar and located respectively between the free ends of cach pair oi' screens for striking said screens to produce vibrations to remove' collected dust.

2. in a dust collecting apparatus, a casing,- a plurality of screens suspended therein, a bar mounted transversely below said screens and adapted to be reciprocated, means earried by said bar and located respectively between the free ends of each pair of screens for `striking said screens to produce vibrations to remove collected dust and means for transmitting said vibrations to the surface of each screen. f'

3. In a dust collecting apparatus,a easing a plurality of screens suspended thereim-a bar mounted trzmsversely below said screens and adapted to be reciprocated, means car` ried by said bar and locatedA respectively be- *tween the free endsof cach pair of screens for striking said screens to produce vibrasaid screen and a plurality of taut wires or tions to remove collected dust and a plucords extending.; to different parts of said rality of vibration transmitting Wires sescreen and in Contact with the screen sur? cured to each screen, said Wires extending face, whereby vibrations produced in said 5 from e substantially common center on each Wires or cords are transmitted directly to 15 screen to different parts of the creen sun said screen.

face, whereby all portions of the screen sur- In testimony whereof, I have hereunto faces are subjected to vibratory action. signed my name.

4. In a dust collecting apparatus, a casing, 10 a screen therein, means arranged to strike A MBROSE G. WARREN. 

